Mold for tires.



M. 13. OVEHMAN.

mom on TIRES.

APPLICATIQH FILE) MAY ll, I912. imagmfin 30 Patented Apr. 24,1917.

lumen/ an A; 0mm

M. C. OVEHMAN.

010 FOR TIRES.

APPLICATION FILED MAY H. 19l2 Patonrcd Apr. 24, 1917 3 SHEETS-SHE 2- INVENTOH M. C. OVERMAN.

MOLD FDR TIRES.

APPUCATEON FILED MAY H. I912.

1,, ,IQSJQEQ Patented Apr. 24,1917.

' 3 SHEETS-SHEE-l a.

4, p 25' n Z I IV VHWOR AT min -,from Fig. 1, w1th the base of partly with its sides to the extent of one-half city; in

vention. Fig. base-ring "oi the mold; and Fig. t is a side MAX CYRUS OVEEMAN, OF NEW YORK, N. Y.

MOLD FOR TIRES.

Specification of. Letters Patent.

Patented Apr. 24., 191

Application filed May 11, 1912. Serial. No. 696,638.

To all whom it may concern:

Be it known that l. hlwx (JYnUs ()vlcunax, a citizen of the United States, residing at 250 West 1 itty-fourth street, New York the county of New York and State of New York, have invented certain new and useful Improvements in Molds for Tires, of which the following is a specification.

My present invention relates to an improved mold for making automobile and other vehicle tires, the features of which will be apparent to those skilled in the art from an understanding of the following description, in connection with the drawings which show vention.

In them Figure 1 is a radial section through a portion of the mold showing the various-rings or parts in their closed posi' tion, Fig. 2- is a perspective of a fragment of a tire made by the mold of my present in- 3 is a perspective view of the elevation thereof. Fig. 5 is an inside perspective view of one of the side-rings of the mold. Fig. (l is a perspective view of one of the inserts; and Fig. 7 insert looking in the direction of the arrow in -Fig. 6.

Q] will now describe the specific devices of the drawings. The mold is made of three principal parts. consisting of a base-ring .t and two side-rings B. The base-ring is shown in perspective in Fig. 3, and in side elevation or plan in Fig. 4; and one of the side-rings B is shown in perspective in Fig. 5.

The base-ring A is made up of a substantially flat ring 1 having an outer periphery 1" which in section has the shape of an arrowhead. This is the core corresponding to the longitudinal V-shaped opening 3 through the tire. 4-4 are hoop-like rings having inwardly extending flanges 4 by which they are secured to both sides of the flat ring 1 by bolts 5. The outer periphery of these hoops 4 corresponds, as will be seen the tire and at the basal of the thickness of the heads (5 corners of the tire.

7-7 are a plurality of hlocl s mounted on the outer periphery of: each hoop 4 in space apart relation, as best shown in Fig. 3, and being relatively staggered on the two hoops. These are the cores corresponding to the one form of mold within my 1nis a view of said sockets 8 in the base of the tire for the reception of the driving blocks on the folly of the vehicle wheel, as set forth in my edpending U. S. application, Serial No.

he hoops t are made in sections held together by the flat ring 1, to which they are bolted by the aforesaid bolts 5. Similarly the flat ring 1 is made in sections staggered relative to those of the hoops so that they all hold together when bolted. The sectional construction. of course. permits the molded tire to be separated from the base of the mold.

1010, in Fig. 1 shows some of the bloc-l-zs or keys which are mounted on one of the parts 'to enter sockets in the other part, when said parts have been properly assembled to complete the base-ring A of the mold.

Each side-ring B has an annular groove 14:. Fig. 1 in its inner face which receives into it the outer edge of one of the hoops t. Said inner face at 15 then completes the other half of the beads 6 of the tire, and then at 16 converges to form the side of the tire. Finally each sidc-ring B has an annular flange 17 that extends inwardly half way across the tread of the tire. These tread thingies 17 are formed with numerous slots 19 (Fig. 5), which are relatively staggered on the two flanges when the parts of the mold are properly assembled. For deter mining: the proper assembling of the mold. the base-ring A has lugs 19 and'the siderings B have ("dt'll a slot 2.0 receiving into it. one of said lugs, as said rings B are brought. together against the base-ring A into the final closed condition of the mold shown in Fig. 1.

21-21 are a large number of inserts each having the shape shown in the detailed views (Figs. 6 and 7) and each being a core corresponding with one of the longitudinal. thread openings 22 in the tire and its con nectcd transverse opening 23. Thus the part 22* of the insert its the opening 22 in thetire; and the part 23* of the insert its the opening, 23 in the tire.

25 is a rectangular head on each insertrreeeivable into one of the slots 18 of the side frames B.

26 is a bolt, one for each insert, engaging: a threaded socket 27 (Fig. 1; in the head of the insert. The heads of these bolts overhang; the sides oi the slots 18 in the flanges 17, as do also the portion 22 of the inserts on the opposite face of tlic flanges with the result that when the bolts 26 are ti zhtcncd they (lamp or hold the inserts rigidly in placc as shown in Figs. 1 and 5.

To usc lhc niold, thc side-rings ll arc 't'ully vquippcd all around with tho inscrts il as al'orcsaid. Thcn a suitable mass of rubbcr imu-rial is applied and distributor] around lll(()I lSlll((il illl'llilfill-t'lllg A of Fig. 3. and tlic. \--sha1iwd Pin" '1. Thou thc ltl(.-llllg$ l arc properly alincd rclatirc to the basering A and arc gradually pressed togcther hydraulically or otherwise in the direction of" closing the mold as in Fig. 1. In so doing, the inserts '31 cut. through the sidcs ot' the ruhhcr mass. but the spaces behind and all around thciu are soon filled by tho exccss ruhlicr which naturall squrczes toward tlic. trcad tlangcs l7. latwccn whosc edges the cxccss finds its way out and is finally cut oil li thc niccting of said cdgcs when th mold is fully closed.

Then the tire is i'ulcanizcd in thc mold. Whcn this and thc other usual opcrations aic coniplctcd. thc insertdiolts 2.6 are loosvncd and the sidr-rings are drawn apart. This lPtN-KS the individual inscrts sticltin; into Ihc trcad ot' the tirc whence they are readily pulled out radially. Finally the sections of the basc-rin A a re unlioltcd to free thc. tire completely from thc mold.

-.-1omc of the advantages of thc mold air: (1) It has nly three main s'cctions. (:2) Th s ovcrfiow is at the top or outcr pcriphcry i' thc mold so that thc exccss nialcrial must ill! all the spaces in the mold including those at the top lictore it. can *scapc. (3) The construction pcriuits the inserts to be readily rci'iiovcd from the molded tire. Further than (Ulllt' away con'iplctcly from the mold and lhcrcforc arc readily kept clean and uiootli. (4 For the same reason, the same mold an heuscd with various shapes and depths of inscrt. to given tires with varying trcad construction.

arc lugs on the side rings which project in position to he struck or pricd against to assist in opcning the mold.

Tho notchcd lugs 30 on the side-rings scrrc to ho connected by bolts to hold the pa rts of the mold together during transporinfirm. ctr.

What. I claim is:

l. tii-c mold comprising a base-ring having an outcr pcriphcry corresponding with thc base o'l thc tire and havinga corc corresponding with the longitudinal opening through the tire; side-rings which are laterally removable and replaceable relative to tho basering, said side-rings each having an inncr l'acc corresponding with one side of thc tire and further having an inwardly directcd annularfiangc, whose inncr icriphery corresponds with half the tread oi the tire, said side-rings having, a sliding it with the base-ring so that tho cxccss material squeezes out between the aforesaid tread flanges, said flanges being inwardly slotted from thcir frce cdgcs; insert-cores having fiat.- sided heads receivable into said slots, and bolts having heads which ovcrlic the sides of said slots and being screw-connected with tlic hrads of the. inserts, which latter also overlie the sides of said slots on the opposite face of the flanges.

2. A mold in separable parts for f rming tires having deprcsscd surface openings, said parts having counting flanges which aliul. when lhc mold parts are togcthcr to form the trcad of tlic the inserts for forming: said dcpresscd openings carried by the trcad-t'orniing flanges within the mold space so that they are forced laterally through the tire-forming material as the. flanges are brought together, and. 'means operable from the outside of the mold for detaching the inserts from the flanges tO lIIQZG them in the fire as the flanged mold part's ar'e. separated.

2-3. A mold in scparablefparts for forming tircs having depressed sur ace openings, said parts having coacting flanges which abut when the mold parts are together to form the trcad of the tire, inserts for forming said deprcsscd openings carried by the treadlorming flanges within the mold space so that they are forced laterally through the tire-forming material as the flanges are brought together, and means operable from the outside of the mold for detaching the inserts from the flanges to leave them in the tire as the. flanged mold parts are separated said moans cdmprising screw connections to the inserts located in transverse slots formed in the edge of the given tread forming: flange.

In testimony whereof I allix my signature in prescnccof two witnesses.

E. \V. lemma, Jr., A. C. McDoNNELL. 

